ADDITIONAL SYSTEM INFORMATION :
Windows 10/JDK 11 (Have not checked JDK 11.0.1 yet)

A DESCRIPTION OF THE PROBLEM :
SimpleDateFormat.

REGRESSION : Last worked in version 10

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Simple test code attached. To be specific, when construct SimpleDateFormat, not only provide the pattern, but also the Locale, then try to format a known date. The value returned by jdk 11 is different from previous jdks.
For example, for Locale "CANADA", in jdk 11, it returns "05-Nov.-2018", while in 1.8.0_171, 9.0.4, 10.0.1, 11-ea-15, it has always returned "05-Nov-2018".. Note the in jdk 11, there is an extra dot "." right after the "Nov" month section.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
With explicit Locale and Pattern for SimpleDateFormat, it should return consistent values by jdk 11, namely
ACTUAL -
JDK 11 formats the date into a String with an extra dot (for Locale CANADA).
Here are some results running attached test program:
C:\Test>set JAVA_HOME=C:\1.8.0_171\Windows

C:\Test>set PATH=%JAVA_HOME%\bin

C:\Test>java -version
java version "1.8.0_171"
Java(TM) SE Runtime Environment (build 1.8.0_171-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.171-b11, mixed mode)

C:\Test>java TestSDF
05-Nov-2018

C:\Test>set JAVA_HOME=C:\9.0.4\Windows

C:\Test>set PATH=%JAVA_HOME%\bin

C:\Test>java -version
java version "9.0.4"
Java(TM) SE Runtime Environment (build 9.0.4+11)
Java HotSpot(TM) 64-Bit Server VM (build 9.0.4+11, mixed mode)

C:\Test>java TestSDF
05-Nov-2018

C:\Test>set JAVA_HOME=C:\10.0.1\Windows

C:\Test>set PATH=%JAVA_HOME%\bin

C:\Test>java -version
java version "10.0.1" 2018-04-17
Java(TM) SE Runtime Environment 18.3 (build 10.0.1+10)
Java HotSpot(TM) 64-Bit Server VM 18.3 (build 10.0.1+10, mixed mode)

C:\Test>java TestSDF
05-Nov-2018

C:\Test>set JAVA_HOME=C:\11.ea.15\Windows

C:\Test>set PATH=%JAVA_HOME%\bin

C:\Test>java -version
java version "11-ea" 2018-09-25
Java(TM) SE Runtime Environment 18.9 (build 11-ea+15)
Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11-ea+15, mixed mode)

C:\Test>java TestSDF
05-Nov-2018

C:\Test>set JAVA_HOME=C:\11\Windows

C:\Test>set PATH=%JAVA_HOME%\bin

C:\Test>java -version
java version "11" 2018-09-25
Java(TM) SE Runtime Environment 18.9 (build 11+28)
Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11+28, mixed mode)

C:\Test>java TestSDF
05-Nov.-2018


---------- BEGIN SOURCE ----------
import java.util.Locale;
import java.text.SimpleDateFormat;
import java.util.Date;

public class TestSDF {
    public static void main(String[] args) {
        Date aDate = new Date(1541431200000L);
        SimpleDateFormat sdf = new SimpleDateFormat("dd-MMM-yyyy", Locale.CANADA);
        String dateToStr = sdf.format(aDate);
        System.out.println(dateToStr);
    }
}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
None.

FREQUENCY : always